tomorrow night, governor romney, but tonight, president obama. and the talk in the oval office before the storm, by the way. we begin this interview, though, four years ago, before the election, when i surprised the then-candidate, by creating a mock photo of his future as it might be. >> i have to say that i have fewer grey hairs than i anticipated. >> reporter: but as we know, that desk is exactly where he ended up, and he was right about the grey hair. every morning, do you have something you say to yourself, or -- you're not a ritual kind of guy? >> no, you know, this walk never gets old. it always reminds you of what incredible opportunities you have to do something that's going to make a difference in people's lives. >> reporter: this unlikely president, who credits the strong women in his life. his grandmother, who tried to work her way up at a bank. and his single mother, who taught him, in this world, anything is possible for any child. >> my biggest regret is that she never got to meet her grandchildren. she would just gobble them up. >